BI V2.5 V-Slot Conversion

thingiverse

This text is a set of instructions for upgrading or converting an existing delta 3D printer to use V-Slot rails instead of traditional belts and pulleys. Here are some highlights: **Assembly and Preparations** * The author advises using the smallest screwdriver that can do the job, as over-tightening may break the anchor's clamp base. * Flags (likely the bearings for the top idler pulley assembly) must be cleaned and assembled carefully to avoid damaging the anchors. **Cables and Rail Preparation** * V-Slot rails are reamed at their ends to enlarge the slit, making it easier for cables to exit. A small file is used to smooth the cables' entry point. * The author offers three options for screwing the rails onto corners: new holes, slide-in tee nuts, or drop-in tee nuts. He chose regular slide-in tee nuts due to the risk of over-tightening with the other two options. **Final Assembly and Cable Insertion** * Remove all original cabling from the rail slits before reassembling. * File sharp edges on the rail where the cables will exit to prevent damage. * The cables are inserted through one end of the rail and guided into place using a file to smooth any sharp edges. Due to their connectors, they cannot be removed from the other side. **Reassembly** * Reattach each carriage by ensuring proper cable routing and alignment (the same distance between top and bottom corners). * Install toothed cable pulleys for the bottom of the print head. * Attach 3 precision shims on one washer. * Apply packing tape to prevent dropped parts from falling into corner holes. **Last Assembly Steps** * Insert a flat side belt onto the upper anchor's upper clasp and cut the excess to size. * Twist the belt 180 degrees counter-clockwise before attaching it to the lower toothed pulley, and secure it in place using an arm tip hole for easy head screw access. * Tighten the carriage to apply the required amount of tension using the adjustable screw located below. Overall, this conversion will require precise alignment, cleaning, file work on edges to prevent damage, use of a correct amount of tightening force during reassembly, and finally installing the toothed pulley supports on top of both rails. It should improve your 3D printing accuracy by significantly reducing the play (wobble) that causes movement or drift as you move from print layer to print layer.